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http://jira.codehaus.org/browse/MNG-4740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Bentmann closed MNG-4740.
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Resolution: Fixed
Fix Version/s: 3.0-beta-2
Assignee: Benjamin Bentmann
Applied in
[r979808|http://svn.apache.org/viewvc?view=revision&revision=979808], thanks!
> Maven hangs with big aggregators with lots of inter-modules dependencies
> ------------------------------------------------------------------------
>
> Key: MNG-4740
> URL: http://jira.codehaus.org/browse/MNG-4740
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 3.0-beta-1
> Reporter: Vincent Latombe
> Assignee: Benjamin Bentmann
> Fix For: 3.0-beta-2
>
> Attachments: hangs.patch
>
>
> Hello,
> On my main aggregator (~280 modules, lots of inter-modules dependencies), I
> noticed that since 3.0-beta-1, maven hangs after displaying the list of
> modules to build. The problem was not occurring with alpha-7.
> After investigation, it seems that with the introduction of parallel build in
> beta-1, the whole list of module dependencies is computed at the beginning of
> the build (see
> http://svn.apache.org/viewvc/maven/maven-3/trunk/maven-core/src/main/java/org/apache/maven/lifecycle/internal/ProjectSegment.java?r1=931884&r2=935334&diff_format=h)
> It turns out that this calculation, done inside
> DefaultProjectDependencyGraph, is very unefficient : if a module is
> referenced n times, its dependencies will be computed n times. The attached
> patch solves the problem by computing the dependency tree for a given
> projectId only once.
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